Show a view over the keyboard

问题:

I am looking for a way on the iPhone, due to a custom 'loading' subview, to have a subview cover the keyboard without dismissing the keyboard. Right now when the subview loads, the keyboard is still topmost. Any ideas?

回答1:

add your loading view as subview on window. It will cover keyboard too. Here is a stackoverflow post for the same

IPhone - Show Wait Indicator

UPDATE

My code

#pragma mark -
#pragma mark Waiting View
- (void)showWaitingView {

    CGRect frame = CGRectMake(90, 190, 32, 32);
    UIActivityIndicatorView* progressInd = [[UIActivityIndicatorView alloc] initWithFrame:frame];
    [progressInd startAnimating];
    progressInd.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhiteLarge;

    frame = CGRectMake(130, 193, 140, 30);
    UILabel *waitingLable = [[UILabel alloc] initWithFrame:frame];
    waitingLable.text = @"Processing...";
    waitingLable.textColor = [UIColor whiteColor];
    waitingLable.font = [UIFont systemFontOfSize:20];;
    waitingLable.backgroundColor = [UIColor clearColor];
    frame = [[UIScreen mainScreen] applicationFrame];
    UIView *theView = [[UIView alloc] initWithFrame:frame];
    theView.backgroundColor = [UIColor blackColor];
    theView.alpha = 0.7;
    theView.tag = 999;
    [theView addSubview:progressInd];
    [theView addSubview:waitingLable];

    [progressInd release];
    [waitingLable release];

    [window addSubview:[theView autorelease]];
    [window bringSubviewToFront:theView];
}

- (void)removeWaitingView {
    UIView *v = [window viewWithTag:999];
    if(v) [v removeFromSuperview];

}

回答2:

@interface UIApplication (Util)

- (void)addSubViewOnFrontWindow:(UIView *)view;

@end

@implementation UIApplication (Util)

- (void)addSubViewOnFrontWindow:(UIView *)view {
    int count = [self.windows count];
    UIWindow *w = [self.windows objectAtIndex:count - 1];
    [w addSubview:view];
}

@end


UIApplication *app = [UIApplication sharedApplication];
[app addSubViewOnFrontWindow:_loadingView];

回答3:

UIWindow *window = [UIApplication sharedApplication].windows.lastObject;
[window addSubview:self.view];                                                                                                                                                                                                                                        
[window bringSubviewToFront:self.view];